<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-button type="primary" @click="showAddCate">添加分类</el-button>
      <tree-table
        :data="cateList"
        :columns="columns"
        :expand-type="false"
        :selection-type="false"
        show-index
        index-text="序号"
        border
        :show-row-hover="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-circle-close"
            v-if="scope.row.cat_deleted"
            style="color: red; font-size: 26px"
          ></i>
          <i
            class="el-icon-circle-check"
            v-else
            style="color: green; font-size: 26px"
          ></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <!-- eslint-disable -->
        <template slot="opt" slot-scope="scope">
          <el-button type="primary" size="mini" icon="el-icon-edit"></el-button>
          <el-button
            type="danger"
            size="mini"
            icon="el-icon-delete"
          ></el-button>
          <el-button
            type="warning"
            size="mini"
            icon="el-icon-setting"
          ></el-button>
        </template>
      </tree-table>
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 5, 10, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="35%"
      @close="addCateDialogClosed"
    >
      <el-form
        ref="addCateFormRef"
        :model="addCateForm"
        :rules="addCateFormRules"
        label-width="80px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            expand-trigger="hover"
            :options="parentCateList"
            :props="cascaderProps"
            clearable
            @change="handleChange"
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Categories',
  data () {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      cateList: [],
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'

        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      // 添加分类的表单数据对象
      addCateForm: {
        // 将要添加的分类的名称
        cat_name: '',
        // 父级分类的数据的id
        cat_pid: 0,
        // 分类的等级。默认要添加的是1级分类
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      selectedKeys: [],
      editDialogVisible: false,
      parentCateList: [],
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover',
        checkStrictly: true
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类列表
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.cateList = res.data.result
      this.total = res.data.total
      // console.log(this.cateList)
      // console.log(this.total)
    },
    handleSizeChange (val) {
      this.queryInfo.pagesize = val
      this.getCateList()
    },
    handleCurrentChange (val) {
      this.queryInfo.pagenum = val
      this.getCateList()
    },
    showAddCate () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    // 获取父级分类的数据列表
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.parentCateList = res.data
      console.log(this.parentCateList)
    },
    handleChange () {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    // 点击按钮，添加新的分类
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) return this.$message.error('添加分类失败！')
        this.$message.success('添加分类成功！')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 监听对话框的关闭，重置表单数据
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
    }
  }
}
</script>

<style scoped lang="less">
.el-button {
  margin-bottom: 20px;
}
.el-pagination {
  margin-top: 20px;
}
</style>
